On Mon, Nov 30, 2020 at 01:31:12PM +0000, Daniel Scally wrote:
> Some types of fwnode_handle do not implement the device_is_available()
> check, such as those created by software_nodes. There isn't really a
> meaningful way to check for the availability of a device that doesn't
> actually exist, so if the check isn't implemented just assume that the
> "device" is present.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx>
> ---
> Changes since RFC v3:
>
> patch introduced
>
> drivers/base/property.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index 4c43d30145c6..a5ca2306796f 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -785,9 +785,14 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put);
> /**
> * fwnode_device_is_available - check if a device is available for use
> * @fwnode: Pointer to the fwnode of the device.
> + *
> + * For fwnode node types that don't implement the .device_is_available()
> + * operation, this function returns true.
> */
> bool fwnode_device_is_available(const struct fwnode_handle *fwnode)
> {
> + if (!fwnode_has_op(fwnode, device_is_available))
> + return true;
> return fwnode_call_bool_op(fwnode, device_is_available);
> }
> EXPORT_SYMBOL_GPL(fwnode_device_is_available);
> --
> 2.25.1
>
--
With Best Regards,
Andy Shevchenko
